Wood patch making machine



Au8- 4, l931 A R. JAYNE 1,816,853

WOOD PATCH MAKING MACHINE INVENT R Z O ATTORNEY Aug.4, 1931. A. R. JAYNE 1,815,853

n WOOD PATCH MAKING MACHINE Filed July 23, 1930 2 sheets-sheet 2 ATTORN FY Patented Aug. 4, 1931 l .Unirse STATES parent er1-Ica `AMES R. JAYNE, OF TACOMA, WASHING/TUN, ASSIGNOR TO GLOBE MACH-HNE MANU- FACTURIN'G COMPANY, A CORPGRATEN GF 'WASEINGTON WOOD PATCH MAKING MACHINE Application led July 23,

This invention relates to patch making machines, and it has reference in particular to a machine that operates to cut from strips of wood, or the like, patches or plugs j for use in patching over pitch pockets, or `other surface imperfections found in lumber soy as to make the lumber suitable for use'in the manufacture of furniture.

Explanatory tothe invention, it will be stated that a considerable amount of lumber is suitable for the manufacture of furniture, especially veneered furniture, except for slight surface imperfections, such as are caused by cracks, pitch pockets, or the like,

which can be corrected. Heretofore, it has been common practise yto cut out the imperfection and to iill in with a Wooden plug *or patch, and ordinarily these plugs or patches were made by hand with special zo'forms of chisels designed for this particular purpose. This, however, is a very slow process, and plugs or patches cannot be l made accuratelywithout very careful and Apainstaking work. Moreover, it is an eX- pensive method when carried out by hand and 'ordinarily the saving does not warrant the costs. f l' In view of theabove, it has been the object of the present invention to provide a machine whereby wooden patchesy of a desired 1 shape may be made quickly and accurately; a machine which is relatively inexpensive, and which is automatic yin so far .as it concerns the feeding into the machine y vof the lpiece from which the patches are to be made `and the shaping and cutting out of the patches.

'It is also an' objecty of the invention to provide for adjustmentsNvl1e1eb-y,the size and shape of the ypatches may be varied within certain limits. Y

VMore specifically stated, the present invention resides in the-provision of a ma-V chine for cutting out wooden patches of rkoblong shape by use of two motor driven, cupped, circular saws placed in axialV alinement and facing each other in spacedy relation, and which may be moved downward- 1y against the piece from which the patches are to be cut so that each saw will operate 1930.l serian No. 470,120.

to form a cut of arcuate form, and the two cuts thus made will intersect to define an elongated patch, tapering to points at its ends and with its side edges bevelled inwardly.

Other objects of the invention reside in the detail of construction of the saw mounting means and the means whereby the saws are reciprocally moved to cause them to' alternately engage with and cut the strip to detach the patches.

Still further objects of the invention reside in the means for intermittently advance ing the strip from which the patches are cut in accordance with the action of the saws. i

Other objects of the invention reside in the various details of construction, and in the combination fof parts, and intheir Vmode of operation, as 'will hereinafter be described. n

Inaccomplishing these and other objects of the invention, I have provided the improved details of construction, the preferred forms of which areV illustrated in the accompanying drawings, wherein- Fig. l is an elevation of a patch cutting machine constructed in accordance with the ypresent invention, a part of the side frame being broken away for better illustrating the motor mounting slide.

Fig. 2 is a sectional View, particularly illustrating the ing the wooden strips to the saws.

Fig. 3 is a top, or plan view of the machine. f

'Figa is a sectional detail, illustrating the reciprocal action of the two saws.

. Fig. 5 is a plan view of the driving means for actuating the motors reciprocally and for advancing the strip. s

Fig. 6 is a perspective view of a part of a wooden strip from which patches have been cut.

Referring more 'in detail to the drawings` feed mechanism for advanc- The frame structure of the machine com- V l and horizontal cross beams 2 connecting the legs. VThese end frames are Joined by 4prises opposite end frames, comprising legsr respectively, and by two sets of parallel cross shafts 5 5l which are fixed at their ends in the cross beams 2 of the end frames.

lll

Mounted slidably on the two sets ofcross shafts, respectively, are blocks 6 and 7',

which are adjustable along the shafts from and toward the longitudinal center of the machine and they may be held at any lset position of adjustment by vmeans of .setY

screws 8 mounted therein yand adapted to be tightened against the shafts. Y Each block vhas a flat, vertical inner surface, as designated at 10 in Figure 1, and disposed flatly against these vertical surfaces, are guides 11 and 12, each off-,which is mounted on its block -by a .pivot bolt `or studl 13, Awhich is fixed therein. VThese guides maybe held at r,different lpositions of angular' adjustment Y `,byvfbolts 1li, which extend througharcuate slots :1 5 ,formed `in -the vlower ends of the guides, asin Figure l, and which are threaded ,into the 'blocks to be tightened kagainst the guides. f Y

l"ll/,.[ounted in the ltwo guides are slides 16 and 17, each of whichvcoinprises'a shank portion -that is reciprocallyY mounted vin ,the guidean'd whichY at its upper endis formed with ajhorizontal platform 118. Electrically k operated motors l 19 and v2O areunounted securely upon the platforms. 18 in axial aline-iV ment, and lixed on the adjacent ends of thel motorshafts 19 and l20 are .circular saws 2,1and22`.L These saws are yof'lilre di- -Lame'ter andare cupped or dished withitheir concave surfaces facingV Figure fl.

' Amann driving shaft 25 is mounted in bearingsr26 and 27 v on Athe cross beams el yeach other, Y as lin .at the'base of the ,frame structure and'rthis shaft isv equipped withftwo .eccentrics or crank 4-portions 2 8 4and29- on ,which ends of connecting rodsSO land 31 VVare mounted;

these rods being pivotally connectedat their .upper ends, respectively, to the .slides .16

and 17 so that rotation of the `shaft 25 will effect reciprocal action Aoffthe slides in their guides. flt 'is to be pointed out .also that the 'guides l1 and 12 are set in such angular .relation onthe blocks and-to each other that,

yas "the slides move upwardly therein, 'the motors will be moved upwardly and outwardly with vrespect to lthe longitudinal center of the'machine; then l'as ,they move downvardl thefmotors willV move down- Y A "6' y driving the twodiscisaws wouldfbe started;

Yat n21, A.and v22', the `ltwo saws are shownin their opposite positions. Y, y Y, Mounted centrallylacross the top ,of the frame, vbetween the motors andsat a right angle with respectto the axial directionof `the motors, is abeam 3Q, `having anguide 31 so thatgthe'strip 32 rests thereon; rhe istrip is .urged down against-the rollers by a pair of spring pressed rollers 38 carried at the -ends of leaf springs 39 adjustably mounted by brackets` l() fixed on top of the cross beam, as in -Figure 2. The shafts 36 and are provided, respectively, with lsprocketwheels ll and 42 and a chain belt 213 i extends about these sprockets so that they will rotate fin unison.-Av At one end ojf' ,the .shaft 37, aratchet wheel del' is fixed, and adjacent this, ra lever Ll5. pivotally vmountedY on j the .shaft .which `carries a spring pressed "pawl ,46 for :engag-Y ing theI ratchet. Links and-t9 connect thefendv of lever v- ,witha I pivotally mounted rockerlever carriedby a pivot 5,1iixet Y in a bearing 52 von acrossbeani 4v of the frame, and providedatone end -with a roller 53 engage-able witha camV 55 f lxedon the driven shaft A coiled spring 59 is attached to the framepand to-the lever d5 to move it upwardlyto maintainthe roller .58 against the cam lThe Vconstruction is such that when the shaft 25 is revolunly driventhe riseof cam engages the roller 53 oftlielever-to causethe outerend ofk theV latterto actuate the ratchet 'mechanism and .the latter to intermittently advance the strip 32. n Thisv advance movement vmay be made ,more or'lessas is` desired byadjusting .the 'connection of `lever l5 'with Vlever 50 vcloser to or away from the pivot 5l.

The particular.mechanism forfdriving lthe mainV shaft is immaterial, but in the present instance, l have illustrated it in AFigure 5, preferablyas being equipped' with a driving gear .65 Iand this :is connected through a train of rreduction gearing `66, 67, and 68 withithe shaft of 'an electric motor 69. ,j The gearing would be designed tordrive the shaft at-t-he'desired, or a suitable speed. f

Assuming the parts to be so constructed and assembled,` operation ofthe machine would fbe asfollows li-rstfthe motors for then a strip of wood vfrom which fthe patches areto be cut,would be applied-Withdrive the mainshafft 25fof vthe machine and,

incident to :rotationof the shaft 25, .the

slides 116 and 1 7w'lwould'be irecipro'cated in v,

. of the saws, while they `are revolving, causes first one and then the other to engage and cut through the strip 32 and the relationship of the saws is such that the arcuate cuts made thereby, as designated by dotted lines at 70 and 7l in Figure 6, will intersect and will define a patch of oblong shape, as shown at 72 inFigure G. While the two saws are in neutral position, and both raised v4from the strip 32, it is advanced a definite msm actuated by the cam 5o, yso that the distance as provided for by the feed mechapatches will closely follow each other along the strip. Y

lf it should be desired to shorten or elongate the patch, this is done by spacing the saws farther apart,'by adjustment of the motors outwardly, or otherwise. l'f it is desired to change the slope of the sides of the patches, this may be done by angular adjustment of the guides in their supporting blocks. This adjustment can also be used to lengthen or shorten the patch. Raising and lowering' the motors and their platforms by adjustment of the connecting rods and 3l also has the effect of increasing and decreasing the length of the patches and for this purpose the connecting rods are provided with right and left hand opposite end threads whereby they are attached to the end members.

The machine, so constructed and operated, will automatically cut out patches at a very rapid rate and the patches will be uniform and accurate in size.

One of the important features of the present invention resides in the fact that the cupped condition of the saws, and the manner in which the saws are actuatedagainst the strip 32 provides that the side edges of the patches willr be tapered. When these patches are applied to the piece to be repaired, the imperfection in the piece is first cut out to provide a socket substantially the shape of the patch. The patch is then inserted and wedged tightlyl in place. -Glue is applied to hold the patch and after the glue has set, the top surface is smoothed off.

This method of applying the patches causes y them to be securely held in place.

Having thus describedmy invention, what I claim as new therein and desire to secure by Letters-Patent, is:

l. A patch cutting machine comprising means for supporting a strip from which patches are to be cut, a pair of circular cupped saws facing veach other in parallel planes,fmeans for driving the saws, and means for successively moving the saws while driven angularly into contact with a strip on said support to form intersecting arcuate cuts therein to define and sever patches from the strip.

2.A patch cutting machine comprising means for supporting a strip from which patches are to be cut, a pair of circular cupped saws spaced apart and facing each other above the strip support, means for driving the saws, and means for alternately moving lthe saws downwardly and inwardly against the strip to form intersecting arcuate cuts therein whereby patches are defined and severed from the strip.

3. A patch cutting machine comprising means for supporting and guiding a strip from which patches are to bey cut, a pair of circular cupped saws facing in opposite directions and disposed axially in a direction transversely with respect to the strip guiding means, means for driving the saws,

vmeans for alternately moving the saws to engage the strip to form arcuate intersecting cuts therein whereby the patches are defined and severed from the strip, and means for intermittently advancing the strip in accordance with action from the saws.

4;. A patch cuttingmachine comprising a strip supporting and guiding means, a pair of circular cupped saws faced toward each other and axially disposed in a plane transversely of the strip guiding and supporting means, a motor for driving each saw, separate means for mounting the motors, driven .means for causing the motor mountings to be reciprocally actuated to thereby move the saws alternately into contact with the strip to form arcuate cuts therein for defining and removing patches from the strip.

5. A patch cutting machine comprising ya strip supporting and guiding means, a pair of circular cupped saws faced toward each other and axially disposed in a plane transversely of the strip guiding and supporting means, a motor for driving each saw, separate means for mounting the motors, driven means for causing the motor mountingsto be reciprocally actuated to thereby move the saws alternately into contact with the strip to form arcuate cutsftherein for defining and removing patches from the strip, and a feed mechanism synchronized with the movement of the motors for intermittently advancing the strip definite amounts.

6. A patch cutting' machine of the char-` acter described comprising a frame structure, a strip supporting beam mounted thereon having a guide groove for receiving a patch forming strip, a pair of guides supported in the frame, a slide mounted in each guide, motors mounted by the slides and disposed at opposite sides of the strip supporting means, and axially in a plane that is transverse with respect to the beam, a

circular saw mounted by the shaft of each i motor, said saws being cupped toward each other, means for reciprocally actuating the 'acter described comprising a frame strucslides lto alternately move the saws into conthe motors are adjustably mounted on their tact with the strip to form intersecting arcu- Supports. ate cuts thereinifor Lthe removal of patches Signed from-the strip. dayof April, V1930.

'7; A patch cutting machine Vof the char-l ture, a strip supporting beam .mounted thereon having a guide groove for l.receivingl a patch forming` strip,`a .pair of guides supported in the frame, a slide mountedA in each guide, motors'mountedby the slides and disposed at opposite sides of the strip supporting means,'and axially in a plane that `is transverse Awithvrespect to the beam,

- a circular saw mounted by the shaftl of each motor, said Vsaws being 'cupped .toward eachV other, ymeans for reciprocally actuating the slides to alternately move the saws into contact ywithrthe stripV to yform intersecting arciuate cuts therein for the removal of patches from-the strip, feed rollersy engaging the strip, ratchet ymechanism for advancing the rollers, and means operable by a connection withthe slide reciprocating means for act- 11 uating the lratchet mechanism.

8. A patch cutting machine of the .character described comprising a frame structure, a strip supporting beam mounted hori- Zontally thereon, and having a guide groove longitudinally thereof forreceiving va patch forming strip, supporting shafts mountedin the-frame transversely of and beneath the beam, blocks adjustably fixed on the said supporting shafts, vguides pivotally mounted ion the blocks, slides mounted in the guides,

motors mounted by the slides and disposed at y oppositesides of the strip supporting beam,

acircular' saw mounted by the shaft ofeach motor, said sawsr being cupped toward each other, av driven shaft having eccentrics therei on and connecting rods 'with ends attached tothe slides and yto the eccentrics whereby" thev slides are. 'caused to reciprocate and f whereby the motors are lowered ito alter-- ,inatelyfbringthe saws into contact with the 'I oiadjustable tofadvance the anguhm @lation the patches.

strip to form arcuate intersecting cuts` thereinfor defining and yremoving the patches.

719,YA device as in vclaim 8 wherein guides are pivotall-y-'mounted on the blocks and are ship ofthe lsaws to 'vary' theY formation lof r10. A 'devicefas in claim 8 V,wherein the con- ,necting rods are adjustable in length to vary i the `relationship of the saws to the strip.

111. A device as in claim 8 lwherein ythe -bloclrs are adjustableon thel shafts tol move pivotally mounted on the bloclfrsY 'to change the angularrelationship of the motor shafts 'wherein the connecting rods" areadjustable Iin 'length yto alter the relationship of the saws with .respectto the strapand'wherein at Tacoma, Washington, this L29th kAMES R. JAYNn 

